Weatherproof wire



Dec. 6, 1932. Y 5. A. FREDERlcKs'oN 1,890,254

WEATHERPROOF WIRE Filed Feb. 7, 1950 Patented Dec. '6, 1932 UNITED STATES PATENT oFF-ICE OT-TO A. FREDERICKSON, OF BEN AVON,

PENNSYLVANIA, ASSIGNOR T0 NATIONAL ELECTRIC PRODUCTS CORPORATION, OF YORK, N. Y.,

A CORPORATION 0F DELA- WEATHERPROOF WIRE Application mea February 7, 1930. serial No. 426,492.

This invention relatesto improvements in weather proof insulated wire.

The invention has for one of its objects the provision of an insulated wire which while aving superior properties is cheaper to produce than insulated wires which have heretofore been available upon the market.

A further object of the present invention resides in the provlsion of an insulated wire which comprises servings of transversely crumpled paper suitably exteriorly impregnated. y

'Further and other objects of the present Ainvention will be hereinafter set forth in the substantially on line 2-2 of Fig. 1.

Fig. 1 of. the drawing, 10 rep-A Referring to resents the central conductor. 1n the manu- 'facture of insulated wire there is first applied over 11. Each wrapping or serving is comprised of transversely crumpled and crinkled paper,-

for example, kraft paper. Fig. 2 shows the transverse crumpled configuration of the paper.

provided by transversely compacting a relatively wider stripof paper 13 (Fig. 1) intoy a. -relatively narrower but thicker wrapping. The wrappings are preferably also disposed upon the wire in two layers, one layer of lwrappingslfl overlying the lower layer of wrappings 11. The wrappings of one layer also preferably extend inreversed and opposite direction with respect to the wrappings of the other layer. Preferably also the edges of adjacent wrappings in each layer overlap -one another as is clearly shown in Fig. 1

with reference to the wrappings 14. It will be-understood tlm* the adiacfmt servings or wrappings in the lower layer similarly overthe conductor, servings or wrappings The crumpled portions 12 are in- After the aper servings are applied, a covering of fibrous material such as a braid 15 is applied. lThis braid 15 is preferably of cotton, but it may be of any fibrous material such as jute or the like. After the braid is appliedin the usual braiding machine the product is ready for impregnation. 16 represents the impregn ating compound.

Before impregnating, the partially fabricated product with the braid in place is placed in the drying room and thoroughly dried out in order that every particle of moisture will be withdrawntherefrom. The material is then removed from the drving room and .placed in saturating tanks where it is thoroughly impregnated with an asphaltic saturant. Care is taken to prevent re-absorption of moisture after the drying operation. By preliminarily thoroughly drying the material it is possible to cause the asphaltie saturant in the saturating tanks to impregnate through the braid and also to impregna-te thoroughly into the paper servings.

After the asphaltic impregnation is complete, the material is removed from the saturatingtanks and run through a bath of stearine pitch to apply the stearine 17. Finally a thin coat of wax-like material 18, preferably paraine wax, isl applied to provide an anti-stick coating. The material is then ready for use.

The in'al product will comprise the central conductor which is covered with the transversely crumpled paper servings thereon disposed in overlying layers with each wrapping of each layer marginally overlying an adjacent wrapping in the same layer'. The wrappings will be covered with a braid and both the braid and both of the wrappings will be thoroughly impregnated with asphaltic saturating material. Over the asphaltic saturating material the stearine pitch coating will provide the desired fire retardent and ame proof properties andthe insulated wire upon its exterior will have desirable anti-stick qualities.

The present application constitutes a continuation in part of my copending application Serial No. 331,694, tiled January 10, 1929.

pitch coating I claim:

1. An insulated wire comprising a central conductor, servings of transversely crumpled and compacted paper disposed `around said conductor, said paper being substantially free of complete twists, and a braided covering without and around the paper's'ervings, both the braid and the servings being impregnated with an asphaltic saturant.

2. The invention set forth in claim 1 in which a stearine-pitch coating is applied over the asphaltic saturated braid and in which an anti-stick coating is applied over the stearine pitch for the purpose described.

3. The invention set forth in claim 1 in which the servings of transversely crumpled and compacted paper are disposed in a multiplicity of layers with the serving of one layer reversely and oppositely disposed with respect to the servings in the underlying layer.

4. The' invention set forth in claim 1 in which each serving of transversely crumpled and compacted paper marginally overlaps at the edge of an adjacent serving.

5. An insulated wire comprising a central conductor with an insulation therefor which comprises servings of' transversely crumpled and compacted crinkled kraft paper, substantially free of complete twists, with the crumpled portions indiscriminately disposed with respect to one another and with a braiding around and without the paper servings and including an asphaltic saturant which exteriorly impregnates through the braiding thoroughly into the paper servings.

6. A weather proof wire having a central conductor and a multiplicity 'of coverings therefor, the outei` covering comprising a braided fabric covering and the inner coverings comprising convolutions of compacted crinkled transversely crumpled paper substantially free of complete twists, impregnating material in said coverings, and a further covering of pitch like material over said outer braided fabric covering, said pitch like material having axrelatively higher melting point than the melting point of the interior impregnating compounds for 'the purpose described.

7. A weather proof insulated wire having a multiplicity of layers of wrapp'ings thereon, each of said wrappings comprising compacted crinkled paper substantially free of complete twists, said wrappings being also impregnated with an im regnating compound, and a covering for suc` layers comprising stearin pitch which has a relatively high melting point. f

8. A weather proof insulated wire Ahaving an insulation comprised of a multiplicity of layers which are impregnated with an asphaltic impregnating compound having a melting point of substantially 150? F., certain of said layers comprising convolutions,

of compacted crinkled paper substantially free of complete twists, 'and a fur-ther outer covering of steari'n'pitch which has a melting point of 200 F. to-resist external heat l and to retain in the inner covering the asphaltic impregnating compound.

9. A weather proof wire comprising a central conductor, a wrapping therefor comprising convolutions' of crinkled compacted paper substantially free of complete twists, each convolution overlapping an adjacent convolution, another like wrapping over the first also comprised of convolutions 'of crinkled compacted paper material and with the convolutions laidy reversely to the convolutions of the first mentioned wrapping. a braided coverin over the7 aforesaid wrapping to protect t e same and retain the same in position, and means in said wrappings-and braided lcovering to impregnate the same.

.10. A weather proof insulated wire comprising a central conductor, .an 'insulation therearound comprising an impregnatedpaper wrapping formedv of crinkled compact-ed paper substantially free of complete twists and having adjacent convolutions overlappingeach other aty the edges, an impregnated braid covering said paper wrapping and having-a coating of stearin pitch thereover for the purpose described.

. tions of crinkled compacted paper with adjacent convolutions overlapping each other at the edges, a braided covering over the aforesaid paper insulating layers, an asphaltic saturant impregnating said paper layers and braided covering, and a stearin pitch coating over the outer impregnated braiding :for the`- n l Y `lll() purpose described.

12. A weather proof insulated wire having a central conductor and an outer braided covering of braid coated with stearin pitch, said insulated wire having within the aforesaid bralded covering and serving with it as the sole insulation of the central conductor 4 an asphaltically impregnated covering wrapping, said wrapping comprising convolutions of crinkled compacted paper substantially free of complete twists, toprovide iiexibility of the wrapping upon bending'and to provide for thorough saturation of the wrapping by the asphalt. 13. weather proof wire in whi ch there is a central conductor and in which the insulation of said conductor is comprised solely of multiple layers of impregnated paper wrappings of compacted crinkled paper disposed nextl adjacent the central conductor and in which .the insulation also comprises an outer naoou im ted braid, said paper being substanof complete twists, and said braid servmtglgl to keepboth of the aper wrappings in bo layers in place an about the conductor.

14. A weather proof insulated wire havin a central conductor and an outer braid covering of braid coated with stearin pitch, said insulated wire having within it convolulo tions of asphaltically impregnated crinkled compacted paper which serve with the .coated braid to comprise the sole insulation of the wire, said paper being substantially free of complete twists. 15 15. A weather proof wire com rising in 'combination with the central con uctor and-- an insulating and weather proof coverin therefor-.comprising a fibrous wra pin o crinkled com acted paper about sai con uc- 20 tor satura with asphaltic impre ating material, another crinkled compac paper wrapping about the first mentioned'wrap ping also saturated with asphaltic impregnatlng material, said paper being substan- 25 tially free of completel twists, a braiding about said wrappings likewise saturated with asphaltic material and serving to hold the cnnkled compacted paper wrappings in place and a further outer pitch like covering 3u comprised of a stearine pitch compotion which has a relativel higher melting point than that of the asp altlcmaterial, or the purpose described'.- Y

In'testimony whereof I hereto aix my 35 signature. OTTO A. FREDERICKSON. 

